fixed signature issues

svncommit

2006-12-03 dd792e8253f6fa94eba4e95293a32f8bc91289bb

 program/js/app.js

@@ -1726,6 +1726,10 @@
      if (this.env.signatures && this.env.signatures[id])
        {
        sig = this.env.signatures[id]['text'];
        if (this.env.signatures[id]['is_html'])
          {
          sig = this.env.signatures[id]['plain_text'];
          }
        if (sig.indexOf('--')!=0)
          sig = '--\n'+sig;
        message += '\n'+sig;